CN207993313U - Transistor, NE555 integrated package working condition demonstrators - Google Patents

Abstract

The utility model is related to a kind of transistor, NE555 integrated package working condition demonstrators, belong to Technical Teaching instrument field, it is characterized in that：Circuit is by DC power supply E, button switch S₁, button switch S₂, capacitor C₁, resistance R₁, voltmeter V₁, transistor T₁, resistance R₂, transistor T₂, voltmeter V₂, resistance R₃, resistance R₄, capacitor C₂, integrated package I, capacitor C₃, buzzer Y, oscillograph Q composition, integrated package I NE555, voltmeter V₁, voltmeter V₂For demonstrating transistor T₁With transistor T₂Conducting state, the simulation that the waveform and buzzer Y that oscillograph Q is shown the are sent out sound that drips is used for demonstrating the rollover states of integrated package I, and advantage and good effect possessed by the utility model are：Simple in structure, operation demonstration is convenient.

Description

Transistor, NE555 integrated package working condition demonstrators

Technical field

The utility model is related to a kind of transistor, NE555 integrated package working condition demonstrators, belong to Technical Teaching instrument Device field.

Background technology

Currently, in Technical Teaching, student is unable to the operation principle of profound understanding electronic component, this demonstration instrument It can make the operation principle of student's profound understanding transistor, NE555 integrated packages, improve students ' interest of study.

Utility model content

The purpose of this utility model is to provide a kind of transistor, NE555 integrated package working condition demonstrators, can demonstrate crystal Pipe, NE555 integrated package working conditions.

What the purpose of this utility model was realized in：Circuit is by DC power supply E, button switch S₁, button switch S₂, electricity Container C₁, resistance R₁, voltmeter V₁, transistor T₁, resistance R₂, transistor T₂, voltmeter V₂, resistance R₃, resistance R₄, capacitor C₂、 Integrated package I, capacitor C₃, buzzer Y, oscillograph Q composition.It is characterized in that：Integrated package I is NE555, integrated package I and buzzer Y It is oscillating circuit, oscillating circuit is a narrow pulse generating circuit being made of NE555 time base circuits, generates and simulates the sound that drips； Transistor T₁, transistor T₂, button switch S₁With button switch S₂It is timing circuit, transistor T₁, transistor T₂Work in out Off status, button switch S₁It is start button, button switch S₂It is pause button, generates booting, delaying shutdown and abort signal, Timing circuit controls the power supply of oscillating circuit.Voltmeter V₁, voltmeter V₂For demonstrating transistor T₁With transistor T₂Conducting State, the simulation that the waveform and buzzer Y that oscillograph Q is shown are sent out drip sound for demonstrating the rollover states of integrated package I, button Switch S₁For start button, button switch S₂For pause button.

Due to the adoption of the above technical scheme, advantage and good effect possessed by the utility model are：Can demonstrate transistor, NE555 integrated package working conditions, simple in structure, intuitive accurate, operation demonstration is convenient.

Description of the drawings

The utility model is further illustrated with reference to the accompanying drawings and examples.

Fig. 1 is the circuit diagram of the utility model.

Fig. 2 is the overall structure diagram of the utility model.

E. DC power supplies S in figure₁Button switch S₂Button switch C₁Capacitor R₁Resistance V₁Voltmeter T₁. Transistor R₂Resistance T₂Transistor V₂Voltmeter R₃Resistance R₄Resistance C₂Capacitor I. integrated packages C₃Capacitor Y. 1. pedestal of buzzer Q. oscillographs, 2. demonstration board

Specific implementation mode：

In Fig. 1, the anode of DC power supply E meets button switch S simultaneously₁One end, transistor T₁Emitter, button opens Close S₁The other end simultaneously meet button switch S₂One end, capacitor C₁Anode and resistance R₁One end, resistance R₁The other end Meet voltmeter V simultaneously₁One end, transistor T₂Base stage, transistor T₂Collector connecting resistance R₂One end, resistance R₂It is another End transistor T₁Base stage, transistor T₁Collector simultaneously meet voltmeter V₂One end, resistance R₃One end, integrated package I 8 Foot, integrated package I 4 feet and buzzer Y one end, voltmeter V₂The other end and transistor T₂Emitter, voltmeter V₁It is another One end, capacitor C₁Cathode, button switch S₂The other end be connected and be followed by the cathode of DC power supply E, resistance R₃The other end Connecting resistance R simultaneously₄One end, integrated package I 7 feet, resistance R₄The other end simultaneously connect 2 feet of integrated package I, 6 feet of integrated package I With capacitor C₂Anode, capacitor C₂Cathode connect the cathode of DC power supply E, 5 feet of integrated package I meet capacitor C₃One end, Capacitor C₃The other end and 1 foot of integrated package I connect the cathode of DC power supply E simultaneously, the other end of buzzer Y connects integrated simultaneously 3 feet of block I, one end of oscillograph Q, the cathode of another termination DC power supply E of oscillograph Q.Integrated package I NE555, voltmeter V₁, voltmeter V₂For demonstrating transistor T₁With transistor T₂Conducting state, the waveform and buzzer Y that oscillograph Q is shown send out The simulation sound that drips be used for demonstrating the rollover states of integrated package I, button switch S₁For start button, button switch S₂To stop to press Button.Component parameters are as follows in circuit：DC power supply E is with 9 volts, transistor T₁With 9012, transistor T₂With 9014, resistance R₁With 1,000,000 Europe, resistance R₂With 20 kilo-ohms, resistance R₃With 200 kilo-ohms, resistance R₄With 1 kilo-ohm, capacitor C₁With 4700 microfarads, capacitor C₂With 10 Microfarad, capacitor C₃With 0.1 microfarad.

In fig. 2, according to position as shown in Figure 2 DC power supply E, button switch S₁, buzzer Y, voltmeter V₁, electricity Press Table V₂, button switch S₂, oscillograph Q be fixed on the front of demonstration board 2, other elements in circuit are fixed on the anti-of demonstration board 2 Face is connected with conducting wire according to Fig. 1.

Demenstration method：Press button switch S₁, voltmeter V₁, voltmeter V₂Show transistor T₁, transistor T₂Conducting shape State, oscillograph Q show the narrow pulse waveform of the 3 feet output of integrated package I, can hear that simulation is dripped sound at this time, circuit after 1 hour It is automatically closed, if midway is not desired to listen the sound that drips, button switch S can be clicked again₂, circuit is stopped.

Claims (1)

1. a kind of transistor, NE555 integrated package working condition demonstrators, circuit is by DC power supply E, button switch S₁, button switch S₂, capacitor C₁, resistance R₁, voltmeter V₁, transistor T₁, resistance R₂, transistor T₂, voltmeter V₂, resistance R₃, resistance R₄, capacitance Device C₂, integrated package I, capacitor C₃, buzzer Y, oscillograph Q composition, it is characterized in that：The anode of DC power supply E connects button simultaneously and opens Close S₁One end, transistor T₁Emitter, button switch S₁The other end simultaneously meet button switch S₂One end, capacitor C₁'s Anode and resistance R₁One end, resistance R₁The other end simultaneously meet voltmeter V₁One end, transistor T₂Base stage, transistor T₂'s Collector connecting resistance R₂One end, resistance R₂Another end transistor T₁Base stage, transistor T₁Collector simultaneously connect voltmeter V₂One end, resistance R₃One end, 8 feet of integrated package I, integrated package I 4 feet and buzzer Y one end, voltmeter V₂It is another End and transistor T₂Emitter, voltmeter V₁The other end, capacitor C₁Cathode, button switch S₂The other end be connected after It is connected to the cathode of DC power supply E, resistance R₃The other end simultaneously connecting resistance R₄One end, integrated package I 7 feet, resistance R₄It is another It holds while meeting 2 feet of integrated package I, 6 feet of integrated package I and capacitor C₂Anode, capacitor C₂Cathode connect DC power supply E's 5 feet of cathode, integrated package I meet capacitor C₃One end, capacitor C₃The other end and integrated package I 1 foot simultaneously connect DC power supply The other end of the cathode of E, buzzer Y connects 3 feet of integrated package I, one end of oscillograph Q, another termination direct current of oscillograph Q simultaneously The cathode of power supply E, integrated package I NE555.